From 39e84790d3b65a4af1ea1fb0d8f06c3ad75304b3 Mon Sep 17 00:00:00 2001
From: Alex Aizman <itn780@yahoo.com>
Date: Thu, 4 Aug 2005 19:31:00 -0700
Subject: [SCSI] open-iscsi/linux-iscsi-5 Initiator: Header files

open-iscsi-headers.patch - common header files:
	- iscsi_if.h (user/kernel #defines and user/kernel events);
	- iscsi_proto.h (RFC3720 #defines and types);
	- scsi_transport_iscsi.h (transport API, transport #defines and types).

Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/iscsi_if.h             | 245 ++++++++++++++++
 include/scsi/iscsi_proto.h          | 566 ++++++++++++++++++++++++++++++++++++
 include/scsi/scsi_transport_iscsi.h | 202 ++++---------
 3 files changed, 866 insertions(+), 147 deletions(-)
 create mode 100644 include/scsi/iscsi_if.h
 create mode 100644 include/scsi/iscsi_proto.h

(limited to 'include/scsi')

diff --git a/include/scsi/iscsi_if.h b/include/scsi/iscsi_if.h
new file mode 100644
index 00000000000..be1bc792ab1
--- /dev/null
+++ b/include/scsi/iscsi_if.h
@@ -0,0 +1,245 @@
+/*
+ * iSCSI User/Kernel Shares (Defines, Constants, Protocol definitions, etc)
+ *
+ * Copyright (C) 2005 Dmitry Yusupov
+ * Copyright (C) 2005 Alex Aizman
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_IF_H
+#define ISCSI_IF_H
+
+#include <scsi/iscsi_proto.h>
+
+#define UEVENT_BASE			10
+#define KEVENT_BASE			100
+#define ISCSI_ERR_BASE			1000
+
+enum iscsi_uevent_e {
+	ISCSI_UEVENT_UNKNOWN		= 0,
+
+	/* down events */
+	ISCSI_UEVENT_CREATE_SESSION	= UEVENT_BASE + 1,
+	ISCSI_UEVENT_DESTROY_SESSION	= UEVENT_BASE + 2,
+	ISCSI_UEVENT_CREATE_CONN	= UEVENT_BASE + 3,
+	ISCSI_UEVENT_DESTROY_CONN	= UEVENT_BASE + 4,
+	ISCSI_UEVENT_BIND_CONN		= UEVENT_BASE + 5,
+	ISCSI_UEVENT_SET_PARAM		= UEVENT_BASE + 6,
+	ISCSI_UEVENT_START_CONN		= UEVENT_BASE + 7,
+	ISCSI_UEVENT_STOP_CONN		= UEVENT_BASE + 8,
+	ISCSI_UEVENT_SEND_PDU		= UEVENT_BASE + 9,
+	ISCSI_UEVENT_GET_STATS		= UEVENT_BASE + 10,
+	ISCSI_UEVENT_GET_PARAM		= UEVENT_BASE + 11,
+
+	/* up events */
+	ISCSI_KEVENT_RECV_PDU		= KEVENT_BASE + 1,
+	ISCSI_KEVENT_CONN_ERROR		= KEVENT_BASE + 2,
+	ISCSI_KEVENT_IF_ERROR		= KEVENT_BASE + 3,
+};
+
+struct iscsi_uevent {
+	uint32_t type; /* k/u events type */
+	uint32_t iferror; /* carries interface or resource errors */
+	uint64_t transport_handle;
+
+	union {
+		/* messages u -> k */
+		struct msg_create_session {
+			uint32_t	initial_cmdsn;
+		} c_session;
+		struct msg_destroy_session {
+			uint64_t	session_handle;
+			uint32_t	sid;
+		} d_session;
+		struct msg_create_conn {
+			uint64_t	session_handle;
+			uint32_t	cid;
+			uint32_t	sid;
+		} c_conn;
+		struct msg_bind_conn {
+			uint64_t	session_handle;
+			uint64_t	conn_handle;
+			uint32_t	transport_fd;
+			uint32_t	is_leading;
+		} b_conn;
+		struct msg_destroy_conn {
+			uint64_t	conn_handle;
+			uint32_t	cid;
+		} d_conn;
+		struct msg_send_pdu {
+			uint32_t	hdr_size;
+			uint32_t	data_size;
+			uint64_t	conn_handle;
+		} send_pdu;
+		struct msg_set_param {
+			uint64_t	conn_handle;
+			uint32_t	param; /* enum iscsi_param */
+			uint32_t	value;
+		} set_param;
+		struct msg_start_conn {
+			uint64_t	conn_handle;
+		} start_conn;
+		struct msg_stop_conn {
+			uint64_t	conn_handle;
+			uint32_t	flag;
+		} stop_conn;
+		struct msg_get_stats {
+			uint64_t	conn_handle;
+		} get_stats;
+	} u;
+	union {
+		/* messages k -> u */
+		uint64_t		handle;
+		int			retcode;
+		struct msg_create_session_ret {
+			uint64_t	session_handle;
+			uint32_t	sid;
+		} c_session_ret;
+		struct msg_recv_req {
+			uint64_t	recv_handle;
+			uint64_t	conn_handle;
+		} recv_req;
+		struct msg_conn_error {
+			uint64_t	conn_handle;
+			uint32_t	error; /* enum iscsi_err */
+		} connerror;
+	} r;
+} __attribute__ ((aligned (sizeof(uint64_t))));
+
+/*
+ * Common error codes
+ */
+enum iscsi_err {
+	ISCSI_OK			= 0,
+
+	ISCSI_ERR_DATASN		= ISCSI_ERR_BASE + 1,
+	ISCSI_ERR_DATA_OFFSET		= ISCSI_ERR_BASE + 2,
+	ISCSI_ERR_MAX_CMDSN		= ISCSI_ERR_BASE + 3,
+	ISCSI_ERR_EXP_CMDSN		= ISCSI_ERR_BASE + 4,
+	ISCSI_ERR_BAD_OPCODE		= ISCSI_ERR_BASE + 5,
+	ISCSI_ERR_DATALEN		= ISCSI_ERR_BASE + 6,
+	ISCSI_ERR_AHSLEN		= ISCSI_ERR_BASE + 7,
+	ISCSI_ERR_PROTO			= ISCSI_ERR_BASE + 8,
+	ISCSI_ERR_LUN			= ISCSI_ERR_BASE + 9,
+	ISCSI_ERR_BAD_ITT		= ISCSI_ERR_BASE + 10,
+	ISCSI_ERR_CONN_FAILED		= ISCSI_ERR_BASE + 11,
+	ISCSI_ERR_R2TSN			= ISCSI_ERR_BASE + 12,
+	ISCSI_ERR_SESSION_FAILED	= ISCSI_ERR_BASE + 13,
+	ISCSI_ERR_HDR_DGST		= ISCSI_ERR_BASE + 14,
+	ISCSI_ERR_DATA_DGST		= ISCSI_ERR_BASE + 15,
+	ISCSI_ERR_PARAM_NOT_FOUND	= ISCSI_ERR_BASE + 16
+};
+
+/*
+ * iSCSI Parameters (RFC3720)
+ */
+enum iscsi_param {
+	ISCSI_PARAM_MAX_RECV_DLENGTH	= 0,
+	ISCSI_PARAM_MAX_XMIT_DLENGTH	= 1,
+	ISCSI_PARAM_HDRDGST_EN		= 2,
+	ISCSI_PARAM_DATADGST_EN		= 3,
+	ISCSI_PARAM_INITIAL_R2T_EN	= 4,
+	ISCSI_PARAM_MAX_R2T		= 5,
+	ISCSI_PARAM_IMM_DATA_EN		= 6,
+	ISCSI_PARAM_FIRST_BURST		= 7,
+	ISCSI_PARAM_MAX_BURST		= 8,
+	ISCSI_PARAM_PDU_INORDER_EN	= 9,
+	ISCSI_PARAM_DATASEQ_INORDER_EN	= 10,
+	ISCSI_PARAM_ERL			= 11,
+	ISCSI_PARAM_IFMARKER_EN		= 12,
+	ISCSI_PARAM_OFMARKER_EN		= 13,
+};
+#define ISCSI_PARAM_MAX			14
+
+typedef uint64_t iscsi_sessionh_t;	/* iSCSI Data-Path session handle */
+typedef uint64_t iscsi_connh_t;		/* iSCSI Data-Path connection handle */
+
+#define iscsi_ptr(_handle) ((void*)(unsigned long)_handle)
+#define iscsi_handle(_ptr) ((uint64_t)(unsigned long)_ptr)
+#define iscsi_hostdata(_hostdata) ((void*)_hostdata + sizeof(unsigned long))
+
+/*
+ * These flags presents iSCSI Data-Path capabilities.
+ */
+#define CAP_RECOVERY_L0		0x1
+#define CAP_RECOVERY_L1		0x2
+#define CAP_RECOVERY_L2		0x4
+#define CAP_MULTI_R2T		0x8
+#define CAP_HDRDGST		0x10
+#define CAP_DATADGST		0x20
+#define CAP_MULTI_CONN		0x40
+#define CAP_TEXT_NEGO		0x80
+#define CAP_MARKERS		0x100
+
+/*
+ * These flags describes reason of stop_conn() call
+ */
+#define STOP_CONN_TERM		0x1
+#define STOP_CONN_SUSPEND	0x2
+#define STOP_CONN_RECOVER	0x3
+
+#define ISCSI_STATS_CUSTOM_MAX		32
+#define ISCSI_STATS_CUSTOM_DESC_MAX	64
+struct iscsi_stats_custom {
+	char desc[ISCSI_STATS_CUSTOM_DESC_MAX];
+	uint64_t value;
+};
+
+/*
+ * struct iscsi_stats - iSCSI Statistics (iSCSI MIB)
+ *
+ * Note: this structure contains counters collected on per-connection basis.
+ */
+struct iscsi_stats {
+	/* octets */
+	uint64_t txdata_octets;
+	uint64_t rxdata_octets;
+
+	/* xmit pdus */
+	uint32_t noptx_pdus;
+	uint32_t scsicmd_pdus;
+	uint32_t tmfcmd_pdus;
+	uint32_t login_pdus;
+	uint32_t text_pdus;
+	uint32_t dataout_pdus;
+	uint32_t logout_pdus;
+	uint32_t snack_pdus;
+
+	/* recv pdus */
+	uint32_t noprx_pdus;
+	uint32_t scsirsp_pdus;
+	uint32_t tmfrsp_pdus;
+	uint32_t textrsp_pdus;
+	uint32_t datain_pdus;
+	uint32_t logoutrsp_pdus;
+	uint32_t r2t_pdus;
+	uint32_t async_pdus;
+	uint32_t rjt_pdus;
+
+	/* errors */
+	uint32_t digest_err;
+	uint32_t timeout_err;
+
+	/*
+	 * iSCSI Custom Statistics support, i.e. Transport could
+	 * extend existing MIB statistics with its own specific statistics
+	 * up to ISCSI_STATS_CUSTOM_MAX
+	 */
+	uint32_t custom_length;
+	struct iscsi_stats_custom custom[0]
+		__attribute__ ((aligned (sizeof(uint64_t))));
+};
+
+#endif
diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
new file mode 100644
index 00000000000..6c08551c79f
--- /dev/null
+++ b/include/scsi/iscsi_proto.h
@@ -0,0 +1,566 @@
+/*
+ * RFC 3720 (iSCSI) protocol data types
+ *
+ * Copyright (C) 2005 Dmitry Yusupov
+ * Copyright (C) 2005 Alex Aizman
+ * maintained by open-iscsi@googlegroups.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * See the file COPYING included with this distribution for more details.
+ */
+
+#ifndef ISCSI_PROTO_H
+#define ISCSI_PROTO_H
+
+#define ISCSI_VERSION_STR	"0.3"
+#define ISCSI_DATE_STR		"22-Apr-2005"
+#define ISCSI_DRAFT20_VERSION	0x00
+
+/* default iSCSI listen port for incoming connections */
+#define ISCSI_LISTEN_PORT	3260
+
+/* Padding word length */
+#define PAD_WORD_LEN		4
+
+/*
+ * useful common(control and data pathes) macro
+ */
+#define ntoh24(p) (((p)[0] << 16) | ((p)[1] << 8) | ((p)[2]))
+#define hton24(p, v) { \
+        p[0] = (((v) >> 16) & 0xFF); \
+        p[1] = (((v) >> 8) & 0xFF); \
+        p[2] = ((v) & 0xFF); \
+}
+#define zero_data(p) {p[0]=0;p[1]=0;p[2]=0;}
+
+/*
+ * iSCSI Template Message Header
+ */
+struct iscsi_hdr {
+	uint8_t		opcode;
+	uint8_t		flags;		/* Final bit */
+	uint8_t		rsvd2[2];
+	uint8_t		hlength;	/* AHSs total length */
+	uint8_t		dlength[3];	/* Data length */
+	uint8_t		lun[8];
+	__be32		itt;		/* Initiator Task Tag */
+	__be32		ttt;		/* Target Task Tag */
+	__be32		statsn;
+	__be32		exp_statsn;
+	uint8_t		other[16];
+};
+
+/************************* RFC 3720 Begin *****************************/
+
+#define ISCSI_RESERVED_TAG		0xffffffff
+
+/* Opcode encoding bits */
+#define ISCSI_OP_RETRY			0x80
+#define ISCSI_OP_IMMEDIATE		0x40
+#define ISCSI_OPCODE_MASK		0x3F
+
+/* Initiator Opcode values */
+#define ISCSI_OP_NOOP_OUT		0x00
+#define ISCSI_OP_SCSI_CMD		0x01
+#define ISCSI_OP_SCSI_TMFUNC		0x02
+#define ISCSI_OP_LOGIN			0x03
+#define ISCSI_OP_TEXT			0x04
+#define ISCSI_OP_SCSI_DATA_OUT		0x05
+#define ISCSI_OP_LOGOUT			0x06
+#define ISCSI_OP_SNACK			0x10
+
+/* Target Opcode values */
+#define ISCSI_OP_NOOP_IN		0x20
+#define ISCSI_OP_SCSI_CMD_RSP		0x21
+#define ISCSI_OP_SCSI_TMFUNC_RSP	0x22
+#define ISCSI_OP_LOGIN_RSP		0x23
+#define ISCSI_OP_TEXT_RSP		0x24
+#define ISCSI_OP_SCSI_DATA_IN		0x25
+#define ISCSI_OP_LOGOUT_RSP		0x26
+#define ISCSI_OP_R2T			0x31
+#define ISCSI_OP_ASYNC_EVENT		0x32
+#define ISCSI_OP_REJECT			0x3f
+
+/* iSCSI PDU Header */
+struct iscsi_cmd {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2;
+	uint8_t cmdrn;
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32 itt;	/* Initiator Task Tag */
+	__be32 data_length;
+	__be32 cmdsn;
+	__be32 exp_statsn;
+	uint8_t cdb[16];	/* SCSI Command Block */
+	/* Additional Data (Command Dependent) */
+};
+
+/* Command PDU flags */
+#define ISCSI_FLAG_CMD_FINAL		0x80
+#define ISCSI_FLAG_CMD_READ		0x40
+#define ISCSI_FLAG_CMD_WRITE		0x20
+#define ISCSI_FLAG_CMD_ATTR_MASK	0x07	/* 3 bits */
+
+/* SCSI Command Attribute values */
+#define ISCSI_ATTR_UNTAGGED		0
+#define ISCSI_ATTR_SIMPLE		1
+#define ISCSI_ATTR_ORDERED		2
+#define ISCSI_ATTR_HEAD_OF_QUEUE	3
+#define ISCSI_ATTR_ACA			4
+
+/* SCSI Response Header */
+struct iscsi_cmd_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t response;
+	uint8_t cmd_status;
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	rsvd1;
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	__be32	exp_datasn;
+	__be32	bi_residual_count;
+	__be32	residual_count;
+	/* Response or Sense Data (optional) */
+};
+
+/* Command Response PDU flags */
+#define ISCSI_FLAG_CMD_BIDI_OVERFLOW	0x10
+#define ISCSI_FLAG_CMD_BIDI_UNDERFLOW	0x08
+#define ISCSI_FLAG_CMD_OVERFLOW		0x04
+#define ISCSI_FLAG_CMD_UNDERFLOW	0x02
+
+/* iSCSI Status values. Valid if Rsp Selector bit is not set */
+#define ISCSI_STATUS_CMD_COMPLETED	0
+#define ISCSI_STATUS_TARGET_FAILURE	1
+#define ISCSI_STATUS_SUBSYS_FAILURE	2
+
+/* Asynchronous Event Header */
+struct iscsi_async {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[2];
+	uint8_t rsvd3;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	uint8_t rsvd4[8];
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	uint8_t async_event;
+	uint8_t async_vcode;
+	__be16	param1;
+	__be16	param2;
+	__be16	param3;
+	uint8_t rsvd5[4];
+};
+
+/* iSCSI Event Codes */
+#define ISCSI_ASYNC_MSG_SCSI_EVENT			0
+#define ISCSI_ASYNC_MSG_REQUEST_LOGOUT			1
+#define ISCSI_ASYNC_MSG_DROPPING_CONNECTION		2
+#define ISCSI_ASYNC_MSG_DROPPING_ALL_CONNECTIONS	3
+#define ISCSI_ASYNC_MSG_PARAM_NEGOTIATION		4
+#define ISCSI_ASYNC_MSG_VENDOR_SPECIFIC			255
+
+/* NOP-Out Message */
+struct iscsi_nopout {
+	uint8_t opcode;
+	uint8_t flags;
+	__be16	rsvd2;
+	uint8_t rsvd3;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	ttt;	/* Target Transfer Tag */
+	__be32	cmdsn;
+	__be32	exp_statsn;
+	uint8_t rsvd4[16];
+};
+
+/* NOP-In Message */
+struct iscsi_nopin {
+	uint8_t opcode;
+	uint8_t flags;
+	__be16	rsvd2;
+	uint8_t rsvd3;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	ttt;	/* Target Transfer Tag */
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	uint8_t rsvd4[12];
+};
+
+/* SCSI Task Management Message Header */
+struct iscsi_tm {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd1[2];
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	rtt;	/* Reference Task Tag */
+	__be32	cmdsn;
+	__be32	exp_statsn;
+	__be32	refcmdsn;
+	__be32	exp_datasn;
+	uint8_t rsvd2[8];
+};
+
+#define ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK	0x7F
+
+/* Function values */
+#define ISCSI_TM_FUNC_ABORT_TASK		1
+#define ISCSI_TM_FUNC_ABORT_TASK_SET		2
+#define ISCSI_TM_FUNC_CLEAR_ACA			3
+#define ISCSI_TM_FUNC_CLEAR_TASK_SET		4
+#define ISCSI_TM_FUNC_LOGICAL_UNIT_RESET	5
+#define ISCSI_TM_FUNC_TARGET_WARM_RESET		6
+#define ISCSI_TM_FUNC_TARGET_COLD_RESET		7
+#define ISCSI_TM_FUNC_TASK_REASSIGN		8
+
+/* SCSI Task Management Response Header */
+struct iscsi_tm_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t response;	/* see Response values below */
+	uint8_t qualifier;
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd2[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	rtt;	/* Reference Task Tag */
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	uint8_t rsvd3[12];
+};
+
+/* Response values */
+#define SCSI_TCP_TM_RESP_COMPLETE	0x00
+#define SCSI_TCP_TM_RESP_NO_TASK	0x01
+#define SCSI_TCP_TM_RESP_NO_LUN		0x02
+#define SCSI_TCP_TM_RESP_TASK_ALLEGIANT	0x03
+#define SCSI_TCP_TM_RESP_NO_FAILOVER	0x04
+#define SCSI_TCP_TM_RESP_NOT_SUPPORTED	0x05
+#define SCSI_TCP_TM_RESP_AUTH_FAILED	0x06
+#define SCSI_TCP_TM_RESP_REJECTED	0xff
+
+/* Ready To Transfer Header */
+struct iscsi_r2t_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[2];
+	uint8_t	hlength;
+	uint8_t	dlength[3];
+	uint8_t lun[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	ttt;	/* Target Transfer Tag */
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	__be32	r2tsn;
+	__be32	data_offset;
+	__be32	data_length;
+};
+
+/* SCSI Data Hdr */
+struct iscsi_data {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[2];
+	uint8_t rsvd3;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32	itt;
+	__be32	ttt;
+	__be32	rsvd4;
+	__be32	exp_statsn;
+	__be32	rsvd5;
+	__be32	datasn;
+	__be32	offset;
+	__be32	rsvd6;
+	/* Payload */
+};
+
+/* SCSI Data Response Hdr */
+struct iscsi_data_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2;
+	uint8_t cmd_status;
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t lun[8];
+	__be32	itt;
+	__be32	ttt;
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	__be32	datasn;
+	__be32	offset;
+	__be32	residual_count;
+};
+
+/* Data Response PDU flags */
+#define ISCSI_FLAG_DATA_ACK		0x40
+#define ISCSI_FLAG_DATA_OVERFLOW	0x04
+#define ISCSI_FLAG_DATA_UNDERFLOW	0x02
+#define ISCSI_FLAG_DATA_STATUS		0x01
+
+/* Text Header */
+struct iscsi_text {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[2];
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd4[8];
+	__be32	itt;
+	__be32	ttt;
+	__be32	cmdsn;
+	__be32	exp_statsn;
+	uint8_t rsvd5[16];
+	/* Text - key=value pairs */
+};
+
+#define ISCSI_FLAG_TEXT_CONTINUE	0x40
+
+/* Text Response Header */
+struct iscsi_text_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[2];
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd4[8];
+	__be32	itt;
+	__be32	ttt;
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	uint8_t rsvd5[12];
+	/* Text Response - key:value pairs */
+};
+
+/* Login Header */
+struct iscsi_login {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t max_version;	/* Max. version supported */
+	uint8_t min_version;	/* Min. version supported */
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t isid[6];	/* Initiator Session ID */
+	__be16	tsih;	/* Target Session Handle */
+	__be32	itt;	/* Initiator Task Tag */
+	__be16	cid;
+	__be16	rsvd3;
+	__be32	cmdsn;
+	__be32	exp_statsn;
+	uint8_t rsvd5[16];
+};
+
+/* Login PDU flags */
+#define ISCSI_FLAG_LOGIN_TRANSIT		0x80
+#define ISCSI_FLAG_LOGIN_CONTINUE		0x40
+#define ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK	0x0C	/* 2 bits */
+#define ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK	0x03	/* 2 bits */
+
+#define ISCSI_LOGIN_CURRENT_STAGE(flags) \
+	((flags & ISCSI_FLAG_LOGIN_CURRENT_STAGE_MASK) >> 2)
+#define ISCSI_LOGIN_NEXT_STAGE(flags) \
+	(flags & ISCSI_FLAG_LOGIN_NEXT_STAGE_MASK)
+
+/* Login Response Header */
+struct iscsi_login_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t max_version;	/* Max. version supported */
+	uint8_t active_version;	/* Active version */
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t isid[6];	/* Initiator Session ID */
+	__be16	tsih;	/* Target Session Handle */
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	rsvd3;
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	uint8_t status_class;	/* see Login RSP ststus classes below */
+	uint8_t status_detail;	/* see Login RSP Status details below */
+	uint8_t rsvd4[10];
+};
+
+/* Login stage (phase) codes for CSG, NSG */
+#define ISCSI_INITIAL_LOGIN_STAGE		-1
+#define ISCSI_SECURITY_NEGOTIATION_STAGE	0
+#define ISCSI_OP_PARMS_NEGOTIATION_STAGE	1
+#define ISCSI_FULL_FEATURE_PHASE		3
+
+/* Login Status response classes */
+#define ISCSI_STATUS_CLS_SUCCESS		0x00
+#define ISCSI_STATUS_CLS_REDIRECT		0x01
+#define ISCSI_STATUS_CLS_INITIATOR_ERR		0x02
+#define ISCSI_STATUS_CLS_TARGET_ERR		0x03
+
+/* Login Status response detail codes */
+/* Class-0 (Success) */
+#define ISCSI_LOGIN_STATUS_ACCEPT		0x00
+
+/* Class-1 (Redirection) */
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_TEMP	0x01
+#define ISCSI_LOGIN_STATUS_TGT_MOVED_PERM	0x02
+
+/* Class-2 (Initiator Error) */
+#define ISCSI_LOGIN_STATUS_INIT_ERR		0x00
+#define ISCSI_LOGIN_STATUS_AUTH_FAILED		0x01
+#define ISCSI_LOGIN_STATUS_TGT_FORBIDDEN	0x02
+#define ISCSI_LOGIN_STATUS_TGT_NOT_FOUND	0x03
+#define ISCSI_LOGIN_STATUS_TGT_REMOVED		0x04
+#define ISCSI_LOGIN_STATUS_NO_VERSION		0x05
+#define ISCSI_LOGIN_STATUS_ISID_ERROR		0x06
+#define ISCSI_LOGIN_STATUS_MISSING_FIELDS	0x07
+#define ISCSI_LOGIN_STATUS_CONN_ADD_FAILED	0x08
+#define ISCSI_LOGIN_STATUS_NO_SESSION_TYPE	0x09
+#define ISCSI_LOGIN_STATUS_NO_SESSION		0x0a
+#define ISCSI_LOGIN_STATUS_INVALID_REQUEST	0x0b
+
+/* Class-3 (Target Error) */
+#define ISCSI_LOGIN_STATUS_TARGET_ERROR		0x00
+#define ISCSI_LOGIN_STATUS_SVC_UNAVAILABLE	0x01
+#define ISCSI_LOGIN_STATUS_NO_RESOURCES		0x02
+
+/* Logout Header */
+struct iscsi_logout {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd1[2];
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd2[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be16	cid;
+	uint8_t rsvd3[2];
+	__be32	cmdsn;
+	__be32	exp_statsn;
+	uint8_t rsvd4[16];
+};
+
+/* Logout PDU flags */
+#define ISCSI_FLAG_LOGOUT_REASON_MASK	0x7F
+
+/* logout reason_code values */
+
+#define ISCSI_LOGOUT_REASON_CLOSE_SESSION	0
+#define ISCSI_LOGOUT_REASON_CLOSE_CONNECTION	1
+#define ISCSI_LOGOUT_REASON_RECOVERY		2
+#define ISCSI_LOGOUT_REASON_AEN_REQUEST		3
+
+/* Logout Response Header */
+struct iscsi_logout_rsp {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t response;	/* see Logout response values below */
+	uint8_t rsvd2;
+	uint8_t hlength;
+	uint8_t dlength[3];
+	uint8_t rsvd3[8];
+	__be32	itt;	/* Initiator Task Tag */
+	__be32	rsvd4;
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	__be32	rsvd5;
+	__be16	t2wait;
+	__be16	t2retain;
+	__be32	rsvd6;
+};
+
+/* logout response status values */
+
+#define ISCSI_LOGOUT_SUCCESS			0
+#define ISCSI_LOGOUT_CID_NOT_FOUND		1
+#define ISCSI_LOGOUT_RECOVERY_UNSUPPORTED	2
+#define ISCSI_LOGOUT_CLEANUP_FAILED		3
+
+/* SNACK Header */
+struct iscsi_snack {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t rsvd2[14];
+	__be32	itt;
+	__be32	begrun;
+	__be32	runlength;
+	__be32	exp_statsn;
+	__be32	rsvd3;
+	__be32	exp_datasn;
+	uint8_t rsvd6[8];
+};
+
+/* SNACK PDU flags */
+#define ISCSI_FLAG_SNACK_TYPE_MASK	0x0F	/* 4 bits */
+
+/* Reject Message Header */
+struct iscsi_reject {
+	uint8_t opcode;
+	uint8_t flags;
+	uint8_t reason;
+	uint8_t rsvd2;
+	uint8_t rsvd3;
+	uint8_t dlength[3];
+	uint8_t rsvd4[16];
+	__be32	statsn;
+	__be32	exp_cmdsn;
+	__be32	max_cmdsn;
+	__be32	datasn;
+	uint8_t rsvd5[8];
+	/* Text - Rejected hdr */
+};
+
+/* Reason for Reject */
+#define CMD_BEFORE_LOGIN	1
+#define DATA_DIGEST_ERROR	2
+#define DATA_SNACK_REJECT	3
+#define ISCSI_PROTOCOL_ERROR	4
+#define CMD_NOT_SUPPORTED	5
+#define IMM_CMD_REJECT		6
+#define TASK_IN_PROGRESS	7
+#define INVALID_SNACK		8
+#define BOOKMARK_REJECTED	9
+#define BOOKMARK_NO_RESOURCES	10
+#define NEGOTIATION_RESET	11
+
+/* Max. number of Key=Value pairs in a text message */
+#define MAX_KEY_VALUE_PAIRS	8192
+
+/* maximum length for text keys/values */
+#define KEY_MAXLEN		64
+#define VALUE_MAXLEN		255
+#define TARGET_NAME_MAXLEN	VALUE_MAXLEN
+
+#define DEFAULT_MAX_RECV_DATA_SEGMENT_LENGTH	8192
+
+/************************* RFC 3720 End *****************************/
+
+#endif /* ISCSI_PROTO_H */
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 1b26a6c0aa2..f25041c386e 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -1,8 +1,10 @@
-/* 
+/*
  * iSCSI transport class definitions
  *
  * Copyright (C) IBM Corporation, 2004
- * Copyright (C) Mike Christie, 2004
+ * Copyright (C) Mike Christie, 2004 - 2005
+ * Copyright (C) Dmitry Yusupov, 2004 - 2005
+ * Copyright (C) Alex Aizman, 2004 - 2005
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -21,158 +23,64 @@
 #ifndef SCSI_TRANSPORT_ISCSI_H
 #define SCSI_TRANSPORT_ISCSI_H
 
-#include <linux/config.h>
-#include <linux/in6.h>
-#include <linux/in.h>
-
-struct scsi_transport_template;
+#include <scsi/iscsi_if.h>
 
-struct iscsi_class_session {
-	uint8_t isid[6];
-	uint16_t tsih;
-	int header_digest;		/* 1 CRC32, 0 None */
-	int data_digest;		/* 1 CRC32, 0 None */
-	uint16_t tpgt;
-	union {
-		struct in6_addr sin6_addr;
-		struct in_addr sin_addr;
-	} u;
-	sa_family_t addr_type;		/* must be AF_INET or AF_INET6 */
-	uint16_t port;			/* must be in network byte order */
-	int initial_r2t;		/* 1 Yes, 0 No */
-	int immediate_data;		/* 1 Yes, 0 No */
-	uint32_t max_recv_data_segment_len;
-	uint32_t max_burst_len;
-	uint32_t first_burst_len;
-	uint16_t def_time2wait;
-	uint16_t def_time2retain;
-	uint16_t max_outstanding_r2t;
-	int data_pdu_in_order;		/* 1 Yes, 0 No */
-	int data_sequence_in_order;	/* 1 Yes, 0 No */
-	int erl;
+/**
+ * struct iscsi_transport - iSCSI Transport template
+ *
+ * @name:		transport name
+ * @caps:		iSCSI Data-Path capabilities
+ * @create_session:	create new iSCSI session object
+ * @destroy_session:	destroy existing iSCSI session object
+ * @create_conn:	create new iSCSI connection
+ * @bind_conn:		associate this connection with existing iSCSI session
+ *			and specified transport descriptor
+ * @destroy_conn:	destroy inactive iSCSI connection
+ * @set_param:		set iSCSI Data-Path operational parameter
+ * @start_conn:		set connection to be operational
+ * @stop_conn:		suspend/recover/terminate connection
+ * @send_pdu:		send iSCSI PDU, Login, Logout, NOP-Out, Reject, Text.
+ *
+ * Template API provided by iSCSI Transport
+ */
+struct iscsi_transport {
+	struct module *owner;
+	char *name;
+	unsigned int caps;
+	struct scsi_host_template *host_template;
+	int hostdata_size;
+	int max_lun;
+	unsigned int max_conn;
+	unsigned int max_cmd_len;
+	iscsi_sessionh_t (*create_session) (uint32_t initial_cmdsn,
+					    struct Scsi_Host *shost);
+	void (*destroy_session) (iscsi_sessionh_t session);
+	iscsi_connh_t (*create_conn) (iscsi_sessionh_t session, uint32_t cid);
+	int (*bind_conn) (iscsi_sessionh_t session, iscsi_connh_t conn,
+			  uint32_t transport_fd, int is_leading);
+	int (*start_conn) (iscsi_connh_t conn);
+	void (*stop_conn) (iscsi_connh_t conn, int flag);
+	void (*destroy_conn) (iscsi_connh_t conn);
+	int (*set_param) (iscsi_connh_t conn, enum iscsi_param param,
+			  uint32_t value);
+	int (*get_param) (iscsi_connh_t conn, enum iscsi_param param,
+			  uint32_t *value);
+	int (*send_pdu) (iscsi_connh_t conn, struct iscsi_hdr *hdr,
+			 char *data, uint32_t data_size);
+	void (*get_stats) (iscsi_connh_t conn, struct iscsi_stats *stats);
 };
 
 /*
- * accessor macros
+ * transport registration upcalls
  */
-#define iscsi_isid(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->isid)
-#define iscsi_tsih(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->tsih)
-#define iscsi_header_digest(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->header_digest)
-#define iscsi_data_digest(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->data_digest)
-#define iscsi_port(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->port)
-#define iscsi_addr_type(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->addr_type)
-#define iscsi_sin_addr(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->u.sin_addr)
-#define iscsi_sin6_addr(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->u.sin6_addr)
-#define iscsi_tpgt(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->tpgt)
-#define iscsi_initial_r2t(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->initial_r2t)
-#define iscsi_immediate_data(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->immediate_data)
-#define iscsi_max_recv_data_segment_len(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->max_recv_data_segment_len)
-#define iscsi_max_burst_len(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->max_burst_len)
-#define iscsi_first_burst_len(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->first_burst_len)
-#define iscsi_def_time2wait(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->def_time2wait)
-#define iscsi_def_time2retain(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->def_time2retain)
-#define iscsi_max_outstanding_r2t(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->max_outstanding_r2t)
-#define iscsi_data_pdu_in_order(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->data_pdu_in_order)
-#define iscsi_data_sequence_in_order(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->data_sequence_in_order)
-#define iscsi_erl(x) \
-	(((struct iscsi_class_session *)&(x)->starget_data)->erl)
+extern int iscsi_register_transport(struct iscsi_transport *tt);
+extern int iscsi_unregister_transport(struct iscsi_transport *tt);
 
 /*
- * The functions by which the transport class and the driver communicate
+ * control plane upcalls
  */
-struct iscsi_function_template {
-	/*
-	 * target attrs
-	 */
-	void (*get_isid)(struct scsi_target *);
-	void (*get_tsih)(struct scsi_target *);
-	void (*get_header_digest)(struct scsi_target *);
-	void (*get_data_digest)(struct scsi_target *);
-	void (*get_port)(struct scsi_target *);
-	void (*get_tpgt)(struct scsi_target *);
-	/*
-	 * In get_ip_address the lld must set the address and
-	 * the address type
-	 */
-	void (*get_ip_address)(struct scsi_target *);
-	/*
-	 * The lld should snprintf the name or alias to the buffer
-	 */
-	ssize_t (*get_target_name)(struct scsi_target *, char *, ssize_t);
-	ssize_t (*get_target_alias)(struct scsi_target *, char *, ssize_t);
-	void (*get_initial_r2t)(struct scsi_target *);
-	void (*get_immediate_data)(struct scsi_target *);
-	void (*get_max_recv_data_segment_len)(struct scsi_target *);
-	void (*get_max_burst_len)(struct scsi_target *);
-	void (*get_first_burst_len)(struct scsi_target *);
-	void (*get_def_time2wait)(struct scsi_target *);
-	void (*get_def_time2retain)(struct scsi_target *);
-	void (*get_max_outstanding_r2t)(struct scsi_target *);
-	void (*get_data_pdu_in_order)(struct scsi_target *);
-	void (*get_data_sequence_in_order)(struct scsi_target *);
-	void (*get_erl)(struct scsi_target *);
-
-	/*
-	 * host atts
-	 */
-
-	/*
-	 * The lld should snprintf the name or alias to the buffer
-	 */
-	ssize_t (*get_initiator_alias)(struct Scsi_Host *, char *, ssize_t);
-	ssize_t (*get_initiator_name)(struct Scsi_Host *, char *, ssize_t);
-	/*
-	 * The driver sets these to tell the transport class it
-	 * wants the attributes displayed in sysfs.  If the show_ flag
-	 * is not set, the attribute will be private to the transport
-	 * class. We could probably just test if a get_ fn was set
-	 * since we only use the values for sysfs but this is how
-	 * fc does it too.
-	 */
-	unsigned long show_isid:1;
-	unsigned long show_tsih:1;
-	unsigned long show_header_digest:1;
-	unsigned long show_data_digest:1;
-	unsigned long show_port:1;
-	unsigned long show_tpgt:1;
-	unsigned long show_ip_address:1;
-	unsigned long show_target_name:1;
-	unsigned long show_target_alias:1;
-	unsigned long show_initial_r2t:1;
-	unsigned long show_immediate_data:1;
-	unsigned long show_max_recv_data_segment_len:1;
-	unsigned long show_max_burst_len:1;
-	unsigned long show_first_burst_len:1;
-	unsigned long show_def_time2wait:1;
-	unsigned long show_def_time2retain:1;
-	unsigned long show_max_outstanding_r2t:1;
-	unsigned long show_data_pdu_in_order:1;
-	unsigned long show_data_sequence_in_order:1;
-	unsigned long show_erl:1;
-	unsigned long show_initiator_name:1;
-	unsigned long show_initiator_alias:1;
-};
-
-struct scsi_transport_template *iscsi_attach_transport(struct iscsi_function_template *);
-void iscsi_release_transport(struct scsi_transport_template *);
+extern void iscsi_conn_error(iscsi_connh_t conn, enum iscsi_err error);
+extern int iscsi_recv_pdu(iscsi_connh_t conn, struct iscsi_hdr *hdr,
+			  char *data, uint32_t data_size);
 
 #endif
-- 
cgit v1.2.3


From baebc497b43a69d7280af226e08214c527220d45 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Mon, 12 Sep 2005 21:01:38 -0500
Subject: [SCSI] iscsi: update some iscsi proto defs

From: michaelc@cs.wisc.edu

Cleanup some iscsi_proto defs, add some missing values, and
fix some defs.

Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/iscsi_proto.h | 45 +++++++++++++++++++++++++++++++++------------
 1 file changed, 33 insertions(+), 12 deletions(-)

(limited to 'include/scsi')

diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
index 6c08551c79f..8d319048044 100644
--- a/include/scsi/iscsi_proto.h
+++ b/include/scsi/iscsi_proto.h
@@ -56,7 +56,8 @@ struct iscsi_hdr {
 	__be32		ttt;		/* Target Task Tag */
 	__be32		statsn;
 	__be32		exp_statsn;
-	uint8_t		other[16];
+	__be32		max_statsn;
+	uint8_t		other[12];
 };
 
 /************************* RFC 3720 Begin *****************************/
@@ -78,6 +79,11 @@ struct iscsi_hdr {
 #define ISCSI_OP_LOGOUT			0x06
 #define ISCSI_OP_SNACK			0x10
 
+#define ISCSI_OP_VENDOR1_CMD		0x1c
+#define ISCSI_OP_VENDOR2_CMD		0x1d
+#define ISCSI_OP_VENDOR3_CMD		0x1e
+#define ISCSI_OP_VENDOR4_CMD		0x1f
+
 /* Target Opcode values */
 #define ISCSI_OP_NOOP_IN		0x20
 #define ISCSI_OP_SCSI_CMD_RSP		0x21
@@ -90,12 +96,20 @@ struct iscsi_hdr {
 #define ISCSI_OP_ASYNC_EVENT		0x32
 #define ISCSI_OP_REJECT			0x3f
 
+struct iscsi_ahs_hdr {
+	__be16 ahslength;
+	uint8_t ahstype;
+	uint8_t ahspec[5];
+};
+
+#define ISCSI_AHSTYPE_CDB		1
+#define ISCSI_AHSTYPE_RLENGTH		2
+
 /* iSCSI PDU Header */
 struct iscsi_cmd {
 	uint8_t opcode;
 	uint8_t flags;
-	uint8_t rsvd2;
-	uint8_t cmdrn;
+	__be16 rsvd2;
 	uint8_t hlength;
 	uint8_t dlength[3];
 	uint8_t lun[8];
@@ -120,6 +134,13 @@ struct iscsi_cmd {
 #define ISCSI_ATTR_HEAD_OF_QUEUE	3
 #define ISCSI_ATTR_ACA			4
 
+struct iscsi_rlength_ahdr {
+	__be16 ahslength;
+	uint8_t ahstype;
+	uint8_t reserved;
+	__be32 read_length;
+};
+
 /* SCSI Response Header */
 struct iscsi_cmd_rsp {
 	uint8_t opcode;
@@ -227,7 +248,7 @@ struct iscsi_tm {
 	uint8_t rsvd2[8];
 };
 
-#define ISCSI_FLAG_TASK_MGMT_FUNCTION_MASK	0x7F
+#define ISCSI_FLAG_TM_FUNC_MASK			0x7F
 
 /* Function values */
 #define ISCSI_TM_FUNC_ABORT_TASK		1
@@ -257,14 +278,14 @@ struct iscsi_tm_rsp {
 };
 
 /* Response values */
-#define SCSI_TCP_TM_RESP_COMPLETE	0x00
-#define SCSI_TCP_TM_RESP_NO_TASK	0x01
-#define SCSI_TCP_TM_RESP_NO_LUN		0x02
-#define SCSI_TCP_TM_RESP_TASK_ALLEGIANT	0x03
-#define SCSI_TCP_TM_RESP_NO_FAILOVER	0x04
-#define SCSI_TCP_TM_RESP_NOT_SUPPORTED	0x05
-#define SCSI_TCP_TM_RESP_AUTH_FAILED	0x06
-#define SCSI_TCP_TM_RESP_REJECTED	0xff
+#define ISCSI_TMF_RSP_COMPLETE		0x00
+#define ISCSI_TMF_RSP_NO_TASK		0x01
+#define ISCSI_TMF_RSP_NO_LUN		0x02
+#define ISCSI_TMF_RSP_TASK_ALLEGIANT	0x03
+#define ISCSI_TMF_RSP_NO_FAILOVER	0x04
+#define ISCSI_TMF_RSP_NOT_SUPPORTED	0x05
+#define ISCSI_TMF_RSP_AUTH_FAILED	0x06
+#define ISCSI_TMF_RSP_REJECTED		0xff
 
 /* Ready To Transfer Header */
 struct iscsi_r2t_rsp {
-- 
cgit v1.2.3


From fa0a6957aa7d02addb08a231c8e7c77c2b8fcd20 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@cs.wisc.edu>
Date: Mon, 12 Sep 2005 21:01:57 -0500
Subject: [SCSI] iscsi: rename some proto defs

From: hare@suse.de

for a proper alignment between open-iscsi and iscsitarget the
definitions in include/iscsi_proto.h do not match exactly.

With this patch it's possible to have iscsitarget use
'include/iscsi_proto.h' instead of its own iscsi_hdr.h.

Signed-off-by: Alex Aizman <itn780@yahoo.com>
Signed-off-by: Dmitry Yusupov <dmitry_yus@yahoo.com>
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/iscsi_proto.h | 28 +++++++++++++++-------------
 1 file changed, 15 insertions(+), 13 deletions(-)

(limited to 'include/scsi')

diff --git a/include/scsi/iscsi_proto.h b/include/scsi/iscsi_proto.h
index 8d319048044..4feda05fdf2 100644
--- a/include/scsi/iscsi_proto.h
+++ b/include/scsi/iscsi_proto.h
@@ -548,9 +548,11 @@ struct iscsi_reject {
 	uint8_t flags;
 	uint8_t reason;
 	uint8_t rsvd2;
-	uint8_t rsvd3;
+	uint8_t hlength;
 	uint8_t dlength[3];
-	uint8_t rsvd4[16];
+	uint8_t rsvd3[8];
+	__be32  ffffffff;
+	uint8_t rsvd4[4];
 	__be32	statsn;
 	__be32	exp_cmdsn;
 	__be32	max_cmdsn;
@@ -560,17 +562,17 @@ struct iscsi_reject {
 };
 
 /* Reason for Reject */
-#define CMD_BEFORE_LOGIN	1
-#define DATA_DIGEST_ERROR	2
-#define DATA_SNACK_REJECT	3
-#define ISCSI_PROTOCOL_ERROR	4
-#define CMD_NOT_SUPPORTED	5
-#define IMM_CMD_REJECT		6
-#define TASK_IN_PROGRESS	7
-#define INVALID_SNACK		8
-#define BOOKMARK_REJECTED	9
-#define BOOKMARK_NO_RESOURCES	10
-#define NEGOTIATION_RESET	11
+#define ISCSI_REASON_CMD_BEFORE_LOGIN	1
+#define ISCSI_REASON_DATA_DIGEST_ERROR	2
+#define ISCSI_REASON_DATA_SNACK_REJECT	3
+#define ISCSI_REASON_PROTOCOL_ERROR	4
+#define ISCSI_REASON_CMD_NOT_SUPPORTED	5
+#define ISCSI_REASON_IMM_CMD_REJECT		6
+#define ISCSI_REASON_TASK_IN_PROGRESS	7
+#define ISCSI_REASON_INVALID_SNACK		8
+#define ISCSI_REASON_BOOKMARK_INVALID	9
+#define ISCSI_REASON_BOOKMARK_NO_RESOURCES	10
+#define ISCSI_REASON_NEGOTIATION_RESET	11
 
 /* Max. number of Key=Value pairs in a text message */
 #define MAX_KEY_VALUE_PAIRS	8192
-- 
cgit v1.2.3


From 9ccfc756a70d454dfa82f48897e2883560c01a0e Mon Sep 17 00:00:00 2001
From: James Bottomley <James.Bottomley@steeleye.com>
Date: Sun, 2 Oct 2005 11:45:08 -0500
Subject: [SCSI] move the mid-layer printk's over to shost/starget/sdev_printk

This should eliminate (at least in the mid layer) to make numeric
assumptions about any of the enumeration variables.  As a side effect,
it will also make all the messages consistent and line us up nicely for
the error logging strategy (if it ever shows itself again).

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_device.h | 6 ++++++
 include/scsi/scsi_host.h   | 4 ++++
 2 files changed, 10 insertions(+)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 7ece05666fe..7f621ab2865 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -148,6 +148,9 @@ struct scsi_device {
 #define transport_class_to_sdev(class_dev) \
 	to_scsi_device(class_dev->dev)
 
+#define sdev_printk(prefix, sdev, fmt, a...)	\
+	dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
+
 /*
  * scsi_target: representation of a scsi target, for now, this is only
  * used for single_lun devices. If no one has active IO to the target,
@@ -177,6 +180,9 @@ static inline struct scsi_target *scsi_target(struct scsi_device *sdev)
 #define transport_class_to_starget(class_dev) \
 	to_scsi_target(class_dev->dev)
 
+#define starget_printk(prefix, starget, fmt, a...)	\
+	dev_printk(prefix, &(starget)->dev, fmt, ##a)
+
 extern struct scsi_device *__scsi_add_device(struct Scsi_Host *,
 		uint, uint, uint, void *hostdata);
 extern int scsi_add_device(struct Scsi_Host *host, uint channel,
diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index 69313ba7505..ea7ad723539 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -609,6 +609,10 @@ struct Scsi_Host {
 #define		class_to_shost(d)	\
 	container_of(d, struct Scsi_Host, shost_classdev)
 
+#define shost_printk(prefix, shost, fmt, a...)	\
+	dev_printk(prefix, &(shost)->shost_gendev, fmt, ##a)
+
+
 int scsi_is_host_device(const struct device *);
 
 static inline struct Scsi_Host *dev_to_shost(struct device *dev)
-- 
cgit v1.2.3


From c3ee74c4e91017169c7f1fa74a57ba8502ec49c3 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 19 Sep 2005 21:59:42 +0200
Subject: [SCSI] scsi_transport_sas: support link error attributes

For now supporting the ->get_linkerrors method is mandatory.  I'll
probably be beaten to implement the .show_foo variables and different
types of attributes soon..

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_transport_sas.h | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index bc4aeb660dd..38389d8dd56 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -41,20 +41,28 @@ struct sas_identify {
 	u8			phy_identifier;
 };
 
-/* The functions by which the transport class and the driver communicate */
-struct sas_function_template {
-};
-
 struct sas_phy {
 	struct device		dev;
 	int			number;
+
+	/* phy identification */
 	struct sas_identify	identify;
+
+	/* phy attributes */
 	enum sas_linkrate	negotiated_linkrate;
 	enum sas_linkrate	minimum_linkrate_hw;
 	enum sas_linkrate	minimum_linkrate;
 	enum sas_linkrate	maximum_linkrate_hw;
 	enum sas_linkrate	maximum_linkrate;
 	u8			port_identifier;
+
+	/* link error statistics */
+	u32			invalid_dword_count;
+	u32			running_disparity_error_count;
+	u32			loss_of_dword_sync_count;
+	u32			phy_reset_problem_count;
+
+	/* the other end of the link */
 	struct sas_rphy		*rphy;
 };
 
@@ -79,6 +87,13 @@ struct sas_rphy {
 #define rphy_to_shost(rphy) \
 	dev_to_shost((rphy)->dev.parent)
 
+
+/* The functions by which the transport class and the driver communicate */
+struct sas_function_template {
+	int (*get_linkerrors)(struct sas_phy *);
+};
+
+
 extern void sas_remove_host(struct Scsi_Host *);
 
 extern struct sas_phy *sas_phy_alloc(struct device *, int);
-- 
cgit v1.2.3


From ac01bbbd3b7ebfca64357aed12cf476b16abe3ce Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 19 Oct 2005 20:01:17 +0200
Subject: [SCSI] sas: add flag for locally attached PHYs

Add a flag to mark a PHY as attached to the HBA as opposed to beeing on
an expander.  This is needed because various features are only supported
on those.  This is a crude hack, the proper fix would be to use
different classes for host-attached vs expander phys.  I'm looking into
that.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_transport_sas.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index 38389d8dd56..57eb68c6e9a 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -56,6 +56,9 @@ struct sas_phy {
 	enum sas_linkrate	maximum_linkrate;
 	u8			port_identifier;
 
+	/* internal state */
+	unsigned int		local_attached : 1;
+
 	/* link error statistics */
 	u32			invalid_dword_count;
 	u32			running_disparity_error_count;
-- 
cgit v1.2.3


From 07ba3a954714da10cbd3f6249d93ac2c1df72c4f Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Wed, 19 Oct 2005 20:01:31 +0200
Subject: [SCSI] sas: add support for PHY resets

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_transport_sas.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_transport_sas.h b/include/scsi/scsi_transport_sas.h
index 57eb68c6e9a..b91400bfb02 100644
--- a/include/scsi/scsi_transport_sas.h
+++ b/include/scsi/scsi_transport_sas.h
@@ -94,6 +94,7 @@ struct sas_rphy {
 /* The functions by which the transport class and the driver communicate */
 struct sas_function_template {
 	int (*get_linkerrors)(struct sas_phy *);
+	int (*phy_reset)(struct sas_phy *, int);
 };
 
 
-- 
cgit v1.2.3


From 91ca7b01ecc916632202180569a7ddbfccfc3f05 Mon Sep 17 00:00:00 2001
From: Andrew Vasquez <andrew.vasquez@qlogic.com>
Date: Thu, 27 Oct 2005 16:03:37 -0700
Subject: [SCSI] Add an 'Issue LIP' device attribute in fc_transport class

Ok, here's a patch to add such a common API for fc transport users.
Relevant LLD changes (lpfc and qla2xxx) also present.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_transport_fc.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index b0d44543737..4496b32972e 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -384,6 +384,8 @@ struct fc_function_template {
 	struct fc_host_statistics * (*get_fc_host_stats)(struct Scsi_Host *);
 	void	(*reset_fc_host_stats)(struct Scsi_Host *);
 
+	int	(*issue_fc_host_lip)(struct Scsi_Host *);
+
 	/* allocation lengths for host-specific data */
 	u32	 			dd_fcrport_size;
 
-- 
cgit v1.2.3


From 13ec92b33e4f41b81b3a237ad1d9a588a81f2f03 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@pobox.com>
Date: Mon, 24 Oct 2005 18:01:11 -0400
Subject: [SCSI] kill unused scsi_scan_single_target()

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_host.h | 2 --
 1 file changed, 2 deletions(-)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index ea7ad723539..ecd53d7872d 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -638,8 +638,6 @@ extern void scsi_flush_work(struct Scsi_Host *);
 extern struct Scsi_Host *scsi_host_alloc(struct scsi_host_template *, int);
 extern int __must_check scsi_add_host(struct Scsi_Host *, struct device *);
 extern void scsi_scan_host(struct Scsi_Host *);
-extern void scsi_scan_single_target(struct Scsi_Host *, unsigned int,
-	unsigned int);
 extern void scsi_rescan_device(struct device *);
 extern void scsi_remove_host(struct Scsi_Host *);
 extern struct Scsi_Host *scsi_host_get(struct Scsi_Host *);
-- 
cgit v1.2.3


From 01d7b3b8d09ef78e2c835c03d97ea1d91c26e245 Mon Sep 17 00:00:00 2001
From: Jeff Garzik <jgarzik@pobox.com>
Date: Mon, 24 Oct 2005 18:03:34 -0400
Subject: [SCSI] introduce sfoo_printk, sfoo_id, sfoo_channel helpers

New dev_printk wrappers, which allow us to shrink code, and
eliminate direct references to host/channel/id/lun members:
	scmd_printk()

Introduce wrappers for highly common idioms, which may also help us
eliminate some ->{channel,id} references in the future:
	{scmd,sdev}_id()
	{scmd,sdev}_channel()

The scmd_* wrappers are present in scsi/scsi_device.h because they all
employ the dereference chain cmd->device->$member.  We would prefer to
use static inline functions rather than macros, but that would have a

Rejections fixed up and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_device.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 7f621ab2865..85cfd88461c 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -151,6 +151,9 @@ struct scsi_device {
 #define sdev_printk(prefix, sdev, fmt, a...)	\
 	dev_printk(prefix, &(sdev)->sdev_gendev, fmt, ##a)
 
+#define scmd_printk(prefix, scmd, fmt, a...)	\
+	dev_printk(prefix, &(scmd)->device->sdev_gendev, fmt, ##a)
+
 /*
  * scsi_target: representation of a scsi target, for now, this is only
  * used for single_lun devices. If no one has active IO to the target,
@@ -272,6 +275,19 @@ extern int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
 			    int data_direction, void *buffer, unsigned bufflen,
 			    struct scsi_sense_hdr *, int timeout, int retries);
 
+static inline unsigned int sdev_channel(struct scsi_device *sdev)
+{
+	return sdev->channel;
+}
+
+static inline unsigned int sdev_id(struct scsi_device *sdev)
+{
+	return sdev->id;
+}
+
+#define scmd_id(scmd) sdev_id((scmd)->device)
+#define scmd_channel(scmd) sdev_channel((scmd)->device)
+
 static inline int scsi_device_online(struct scsi_device *sdev)
 {
 	return sdev->sdev_state != SDEV_OFFLINE;
-- 
cgit v1.2.3


From 19a7b4aebf9ad435c69a7e39930338499af4d152 Mon Sep 17 00:00:00 2001
From: "James.Smart@Emulex.Com" <James.Smart@Emulex.Com>
Date: Tue, 18 Oct 2005 12:03:35 -0400
Subject: [SCSI] update fc_transport for removal of block/unblock functions

We recently went back to implement a board reset. When we perform the
reset, we wanted to tear down the internal data structures and rebuild
them. Unfortunately, when it came to the rport structure, things were
odd. If we deleted them, the scsi targets and sdevs would be
torn down. Not a good thing for a temporary reset. We could block the
rports, but we either maintain the internal structures to keep the
rport reference (perhaps even replicating what's in the transport),
or we have to fatten the fc transport with new search routines to find
the rport (and deal with a case of a dangling rport that the driver
forgets).

It dawned on me that we had actually reached this state incorrectly.
When the fc transport first started, we did the block/unblock first, then
added the rport interface. The purpose of block/unblock is to hide the
temporary disappearance of the rport (e.g. being deleted, then readded).
Why are we making the driver do the block/unblock ? We should be making
the transport have only an rport add/delete, and the let the transport
handle the block/unblock.

So... This patch removes the existing fc_remote_port_block/unblock
functions. It moves the block/unblock functionality into the
fc_remote_port_add/delete functions.  Updates for the lpfc driver are
included. Qlogic driver updates are also enclosed, thanks to the
contributions of Andrew Vasquez. [Note: the qla2xxx changes are
relative to the scsi-misc-2.6 tree as of this morning - which does
not include the recent patches sent by Andrew]. The zfcp driver does
not use the block/unblock functions.

One last comment: The resulting behavior feels very clean. The LLDD is
concerned only with add/delete, which corresponds to the physical
disappearance.  However, the fact that the scsi target and sdevs are
not immediately torn down after the LLDD calls delete causes an
interesting scenario... the midlayer can call the xxx_slave_alloc and
xxx_queuecommand functions with a sdev that is at the location the
rport used to be. The driver must validate the device exists when it
first enters these functions. In thinking about it, this has always
been the case for the LLDD and these routines. The existing drivers
already check for existence. However, this highlights that simple
validation via data structure dereferencing needs to be watched.
To deal with this, a new transport function, fc_remote_port_chkready()
was created that LLDDs should call when they first enter these two
routines. It validates the rport state, and returns a scsi result
which could be returned. In addition to solving the above, it also
creates consistent behavior from the LLDD's when the block and deletes
are occuring.

Rejections fixed up and
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
---
 include/scsi/scsi_transport_fc.h | 31 +++++++++++++++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

(limited to 'include/scsi')

diff --git a/include/scsi/scsi_transport_fc.h b/include/scsi/scsi_transport_fc.h
index 4496b32972e..319ff7a60df 100644
--- a/include/scsi/scsi_transport_fc.h
+++ b/include/scsi/scsi_transport_fc.h
@@ -28,6 +28,7 @@
 #define SCSI_TRANSPORT_FC_H
 
 #include <linux/config.h>
+#include <scsi/scsi.h>
 
 struct scsi_transport_template;
 
@@ -429,6 +430,34 @@ struct fc_function_template {
 };
 
 
+/**
+ * fc_remote_port_chkready - called to validate the remote port state
+ *   prior to initiating io to the port.
+ *
+ * Returns a scsi result code that can be returned by the LLDD.
+ *
+ * @rport:	remote port to be checked
+ **/
+static inline int
+fc_remote_port_chkready(struct fc_rport *rport)
+{
+	int result;
+
+	switch (rport->port_state) {
+	case FC_PORTSTATE_ONLINE:
+		result = 0;
+		break;
+	case FC_PORTSTATE_BLOCKED:
+		result = DID_BUS_BUSY << 16;
+		break;
+	default:
+		result = DID_NO_CONNECT << 16;
+		break;
+	}
+	return result;
+}
+
+
 struct scsi_transport_template *fc_attach_transport(
 			struct fc_function_template *);
 void fc_release_transport(struct scsi_transport_template *);
@@ -437,8 +466,6 @@ struct fc_rport *fc_remote_port_add(struct Scsi_Host *shost,
 			int channel, struct fc_rport_identifiers  *ids);
 void fc_remote_port_delete(struct fc_rport  *rport);
 void fc_remote_port_rolechg(struct fc_rport  *rport, u32 roles);
-int fc_remote_port_block(struct fc_rport *rport);
-void fc_remote_port_unblock(struct fc_rport *rport);
 int scsi_is_fc_rport(const struct device *);
 
 static inline u64 wwn_to_u64(u8 *wwn)
-- 
cgit v1.2.3